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Glicymeris americanus Bivalve Probably James City Formation; found Aurora, North Carolina, USA Lower Pleistocene (2.588 ± 0.005 and 0.781 ± 0.005 million years ago) Glycymeris, common name the bittersweet clams, is a genus of saltwater clams, marine bivalve molluscs in the family Glycymerididae. These clams are very common in the fossil state, from Cretaceous period in the Valanginian age (from 112.6 to o 0.012 million years ago). Fossil shells of these molluscs can be found all over the world. Genus Glycymeris includes about 100 extinct species. The shells are generally biconvex, with equal valves round in outline, and slightly longer than wide. Their size varies from medium to large. The external ligament lacks transverse striations. These clams are a facultatively mobile infaunal suspension feeders. Kingdom: Animalia Phylum: Mollusca Class: Bivalvia Subclass: Pteriomorpha Order: Arcoida Family: Glycymerididae Genus: Glycymeris Species: americanus

Glicymeris americanus Bivalve Probably James City Formation; found Aurora, North Carolina, USA Lower Pleistocene (2.588 ± 0.005 and 0.781 ± 0.005 million years ago) Glycymeris, common name the bittersweet clams, is a genus of saltwater clams, marine bivalve molluscs in the family Glycymerididae. These clams are very common in the fossil state, from Cretaceous period in the Valanginian age (from 112.6 to o 0.012 million years ago). Fossil shells of these molluscs can be found all over the world. Genus Glycymeris includes about 100 extinct species. The shells are generally biconvex, with equal valves round in outline, and slightly longer than wide. Their size varies from medium to large. The external ligament lacks transverse striations. These clams are a facultatively mobile infaunal suspension feeders. Kingdom: Animalia Phylum: Mollusca Class: Bivalvia Subclass: Pteriomorpha Order: Arcoida Family: Glycymerididae Genus: Glycymeris Species: americanus